Thank you for your suggestion. Upon closer scrutiny of my AIM (page 156), I see that there is a tab, on the temperature switch wire, which is screwed into the intake manifold. The tab does not carry a part number so I'm guessing it was molded into the wire. All this leads me to suspect that the plastic tab currently on my car is a production line anomaly or was installed while repairs were being done by the previous owner.

I just threw away a complete forward lamp harness from a 68 L-6 and there were the remains of a clip just like that on the sending unit wire. It had black tape wrapped around each end where the wire passes thru. Check with the guys at M&H Electric as they have all of the blueprints from GM regarding wiring harnesses as they may sell you just that clip w/o having to buy a complete harness. Their part number for the non-RS L6 forward lamp harness is 11825. Here is their website: www.wiringharness.com ..............RatPack..............

Right. My original thought was that the clip looks like the ones that are wrapped in the harnesses. Though, most of the ones I've seen have either a clip or "lug" on them for mounting. But I have a V8 car with gauges... The way the wire runs through the one in your pic is not correct. Someone did some "repair". As stated, it would originally have had the wire taped to it or something similar, IMHO.

The way the wire runs through the one in your pic is not correct. Someone did some "repair".

Actually that is the way that wire is supposed to attach to the retaining clip. The tape was just used as an extra way of securing the wire to the clip. I think he has the correct clip, just needs to add the correct tape to each end.....................RatPack.......................

The way the wire runs through the one in your pic is not correct. Someone did some "repair".

Actually that is the way that wire is supposed to attach to the retaining clip. The tape was just used as an extra way of securing the wire to the clip. I think he has the correct clip, just needs to add the correct tape to each end.....................RatPack.......................

That doesn't seem right to me. One can already see all the damage to the wire. I personally wouldn't do that. Plus, that would mean that every time one has to replace that clip (or any like it), they would have to remove the connector and put it back on. Even when first building the harness at the supplier. Not that it should need to be replaced often at all. It would also be a different procedure compared to the rest of the clips in the harness that are added while wrapping it.?.?

Honestly, I have no expertise on how GM did it in the 60s. It just seems weird to me to have one clip added using one method and the rest a different way... Plus, the chafing... I'll leave it up to the experts.